Research Article
Life Cycle Assessment of Environmental Impact of Steelmaking Process
Table 2
Life cycle assessment midpoint results of molten steel.
| | Categories | Unit | Total | Electricity | Scrap steel | Ingredients | Fuel | Molten iron | Working medium |
| | Carcinogens | kg C2H3Cl eq | 16.93 | 0.05 | 7.22 | 3.43 | 0.70 | 5.01 | 0.52 | | Noncarcinogens | kg C2H3Cl eq | 158.18 | 0.75 | 73.35 | 16.97 | 0.03 | 66.43 | 0.65 | | Respiratory inorganics | kg PM2.5 eq | 0.42 | 0.01 | 0.04 | 0.05 | 0.01 | 0.27 | 0.05 | | Ionizing radiation | Bq C-14 eq | 11990.73 | 77.76 | 0.00 | 425.30 | 19.96 | 5479.27 | 5988.44 | | Ozone layer depletion | kg CFC-11 eq | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | Respiratory organics | kg C2H4 eq | 0.21 | 0.00 | 0.03 | 0.01 | 0.02 | 0.14 | 0.01 | | Aquatic ecotoxicity | kg TEG water | 8102543.87 | 84954.23 | 38796.06 | 55164.71 | 244.41 | 7865355.15 | 58029.32 | | Terrestrial ecotoxicity | kg TEG soil | 21450.23 | 68.07 | 16273.15 | 555.35 | 60.84 | 4089.03 | 403.79 | | Terrestrial acid/nitrification | kg SO2 eq | 7.12 | 0.23 | 0.58 | 1.28 | 0.09 | 4.07 | 0.87 | | Land occupation | m2a | 10.68 | 0.13 | 0.98 | 1.51 | 0.04 | 6.98 | 1.05 | | Aquatic acidification | kg SO2 eq | 1.96 | 0.08 | 0.16 | 0.38 | 0.02 | 0.95 | 0.37 | | Aquatic eutrophication | kg PO43- eq | 0.13 | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 0.00 | | Global warming | kg CO2 eq | 358.54 | 25.68 | 56.22 | 91.71 | 5.30 | 120.63 | 59.01 | | Nonrenewable energy | MJ primary | 27914.93 | 293.34 | 543.59 | 794.31 | 96.03 | 24870.01 | 1317.65 | | Mineral extraction | MJ surplus | 3.25 | 0.02 | 0.24 | 2.09 | 0.01 | 0.58 | 0.30 |
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